− | A small intestinal (SI)volvulus occurs in the horse when the intestine rotates on its mesenteric axis through an angle greater than 180<sup>o</sup>, resulting in strangulation. The pathogenesis is thought to be due to a segment of hypermotile intestine preceding a segment where peristalsis has ceased, leading to the development of a twist. Volvulus may occur as a primary cause of colic or secondarily as a result of another condition such as a lipoma, incarceration within the mesentery or adhesion within the abdomen. | + | A small intestinal (SI) volvulus occurs in the horse when the intestine rotates on its mesenteric axis through an angle greater than 180<sup>o</sup>, resulting in strangulation. The pathogenesis is thought to be due to a segment of hypermotile intestine preceding a segment where peristalsis has ceased, leading to the development of a twist. Volvulus may occur as a primary cause of colic or secondarily as a result of another condition such as a lipoma, incarceration within the mesentery or adhesion within the abdomen. |